diff --git a/packages/extension/src/libs/keyring/public-keyring.ts b/packages/extension/src/libs/keyring/public-keyring.ts
index 87fbc4349..6f58aa10d 100644
--- a/packages/extension/src/libs/keyring/public-keyring.ts
+++ b/packages/extension/src/libs/keyring/public-keyring.ts
@@ -64,16 +64,16 @@ class PublicKeyRing {
         walletType: WalletType.mnemonic,
         isHardware: false,
       };
-      allKeys["ltc1qccf4af6j3xm9v3r6ujt7dlmvazywzq82hnuwgx"] = {
-        address: "ltc1qccf4af6j3xm9v3r6ujt7dlmvazywzq82hnuwgx",
-        basePath: "m/49'/2'/0'/1",
-        name: "fake ltc account #4",
-        pathIndex: 0,
-        publicKey: "0x0",
-        signerType: SignerType.secp256k1btc,
-        walletType: WalletType.mnemonic,
-        isHardware: false,
-      };
+      // allKeys["ltc1qccf4af6j3xm9v3r6ujt7dlmvazywzq82hnuwgx"] = {
+      //   address: "ltc1qccf4af6j3xm9v3r6ujt7dlmvazywzq82hnuwgx",
+      //   basePath: "m/49'/2'/0'/1",
+      //   name: "fake ltc account #4",
+      //   pathIndex: 0,
+      //   publicKey: "0x0",
+      //   signerType: SignerType.secp256k1btc,
+      //   walletType: WalletType.mnemonic,
+      //   isHardware: false,
+      // };
     }
     return allKeys;
   }
diff --git a/packages/extension/src/providers/bitcoin/libs/api-ss.ts b/packages/extension/src/providers/bitcoin/libs/api-ss.ts
index 42671d7c5..df9899e73 100644
--- a/packages/extension/src/providers/bitcoin/libs/api-ss.ts
+++ b/packages/extension/src/providers/bitcoin/libs/api-ss.ts
@@ -63,7 +63,8 @@ class API implements ProviderAPIInterface {
         return toBN(balance.balance)
           .add(toBN(balance.unconfirmedBalance))
           .toString();
-      });
+      })
+      .catch(() => "0");
   }
   async broadcastTx(rawtx: string): Promise<boolean> {
     return fetch(`${this.node}/api/v1/send`, {
diff --git a/packages/extension/src/providers/bitcoin/libs/api.ts b/packages/extension/src/providers/bitcoin/libs/api.ts
index 1ee289e6f..da9dc6bf0 100644
--- a/packages/extension/src/providers/bitcoin/libs/api.ts
+++ b/packages/extension/src/providers/bitcoin/libs/api.ts
@@ -56,7 +56,8 @@ class API implements ProviderAPIInterface {
       .then((balance: HaskoinBalanceType) => {
         if ((balance as any).error) return "0";
         return toBN(balance.confirmed).addn(balance.unconfirmed).toString();
-      });
+      })
+      .catch(() => "0");
   }
   async broadcastTx(rawtx: string): Promise<boolean> {
     return fetch(`${this.node}transactions`, {
diff --git a/packages/extension/src/providers/bitcoin/libs/ss-fee-handler.ts b/packages/extension/src/providers/bitcoin/libs/ss-fee-handler.ts
index 1cc641602..81151b173 100644
--- a/packages/extension/src/providers/bitcoin/libs/ss-fee-handler.ts
+++ b/packages/extension/src/providers/bitcoin/libs/ss-fee-handler.ts
@@ -19,6 +19,8 @@ const SSFeeHandler = async (
     .then((json: FeeType) => {
       if (json.fast.satsPerKiloByte < 0)
         json.fast.satsPerKiloByte = json.average.satsPerKiloByte;
+      if (json.average.satsPerKiloByte < 0)
+        json.average.satsPerKiloByte = json.slow.satsPerKiloByte;
       return {
         [GasPriceTypes.FASTEST]:
           Math.ceil(json.fast.satsPerKiloByte / 1024) + 5,
diff --git a/packages/extension/src/providers/bitcoin/networks/bitcoin-testnet.ts b/packages/extension/src/providers/bitcoin/networks/bitcoin-testnet.ts
index fe2c96906..fe9c716d2 100644
--- a/packages/extension/src/providers/bitcoin/networks/bitcoin-testnet.ts
+++ b/packages/extension/src/providers/bitcoin/networks/bitcoin-testnet.ts
@@ -46,6 +46,7 @@ const bitcoinOptions: BitcoinNetworkOptions = {
     wif: 0xef,
     dustThreshold: null,
     paymentType: PaymentType.P2WPKH,
+    maxFeeRate: 5000 * 2,
   },
 };
 
diff --git a/packages/extension/src/providers/bitcoin/networks/bitcoin.ts b/packages/extension/src/providers/bitcoin/networks/bitcoin.ts
index 8e17d7db0..20641fb26 100644
--- a/packages/extension/src/providers/bitcoin/networks/bitcoin.ts
+++ b/packages/extension/src/providers/bitcoin/networks/bitcoin.ts
@@ -39,6 +39,7 @@ const bitcoinOptions: BitcoinNetworkOptions = {
     wif: 0x80,
     dustThreshold: null,
     paymentType: PaymentType.P2WPKH,
+    maxFeeRate: 5000,
   },
 };
 
diff --git a/packages/extension/src/providers/bitcoin/networks/dogecoin.ts b/packages/extension/src/providers/bitcoin/networks/dogecoin.ts
index 63b06beea..589503314 100644
--- a/packages/extension/src/providers/bitcoin/networks/dogecoin.ts
+++ b/packages/extension/src/providers/bitcoin/networks/dogecoin.ts
@@ -41,6 +41,7 @@ const dogeOptions: BitcoinNetworkOptions = {
     wif: 0x9e,
     dustThreshold: null,
     paymentType: PaymentType.P2PKH,
+    maxFeeRate: 5000 * 4,
   },
 };
 
diff --git a/packages/extension/src/providers/bitcoin/networks/litecoin.ts b/packages/extension/src/providers/bitcoin/networks/litecoin.ts
index a565d52e9..050b569e7 100644
--- a/packages/extension/src/providers/bitcoin/networks/litecoin.ts
+++ b/packages/extension/src/providers/bitcoin/networks/litecoin.ts
@@ -41,6 +41,7 @@ const litecoinOptions: BitcoinNetworkOptions = {
     wif: 0xb0,
     dustThreshold: null,
     paymentType: PaymentType.P2WPKH,
+    maxFeeRate: 5000 * 2,
   },
 };
 
diff --git a/packages/extension/src/providers/bitcoin/types/index.ts b/packages/extension/src/providers/bitcoin/types/index.ts
index d5c965487..011822d6d 100644
--- a/packages/extension/src/providers/bitcoin/types/index.ts
+++ b/packages/extension/src/providers/bitcoin/types/index.ts
@@ -19,6 +19,7 @@ export interface BitcoinNetworkInfo {
   wif: number;
   dustThreshold: null;
   paymentType: PaymentType;
+  maxFeeRate: number;
 }
 
 export interface HaskoinBalanceType {
diff --git a/packages/extension/src/providers/bitcoin/ui/libs/signer.ts b/packages/extension/src/providers/bitcoin/ui/libs/signer.ts
index afe2e7098..dbafcb399 100644
--- a/packages/extension/src/providers/bitcoin/ui/libs/signer.ts
+++ b/packages/extension/src/providers/bitcoin/ui/libs/signer.ts
@@ -32,7 +32,10 @@ const TransactionSigner = (
         });
       },
     };
-    const tx = new Psbt({ network: network.networkInfo });
+    const tx = new Psbt({
+      network: network.networkInfo,
+      maximumFeeRate: network.networkInfo.maxFeeRate,
+    });
     payload.inputs
       .map((u) => {
         const res: {